EP0280202A1 - Procédé de fabrication d'un anneau de synchronisation - Google Patents

Procédé de fabrication d'un anneau de synchronisation Download PDF

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Publication number
EP0280202A1
EP0280202A1 EP88102404A EP88102404A EP0280202A1 EP 0280202 A1 EP0280202 A1 EP 0280202A1 EP 88102404 A EP88102404 A EP 88102404A EP 88102404 A EP88102404 A EP 88102404A EP 0280202 A1 EP0280202 A1 EP 0280202A1
Authority
EP
European Patent Office
Prior art keywords
sintered
ring
friction
friction lining
support ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88102404A
Other languages
German (de)
English (en)
Other versions
EP0280202B1 (fr
Inventor
Johann Gramberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miba Sintermetall GmbH
ZWN Zahnradwerk Neuenstein GmbH and Co
Original Assignee
Miba Sintermetall GmbH
ZWN Zahnradwerk Neuenstein GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miba Sintermetall GmbH, ZWN Zahnradwerk Neuenstein GmbH and Co filed Critical Miba Sintermetall GmbH
Priority to AT88102404T priority Critical patent/ATE88796T1/de
Publication of EP0280202A1 publication Critical patent/EP0280202A1/fr
Application granted granted Critical
Publication of EP0280202B1 publication Critical patent/EP0280202B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/025—Synchro rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly

Definitions

  • the invention relates to a method for producing a synchronizer ring with a conical or cylindrical friction surface, a friction lining prefabricated from a sintered material being connected to a support ring.
  • the invention further relates to a method for producing a friction body, in which a compact is produced from a sintered powder under pressure, the compact is pre-sintered and then sintered onto a support body.
  • friction rings such as those used in synchronizing devices for manual transmissions, are usually not provided with friction linings made of a sintered material, because the application of the sintered powder to the cylindrical or conical friction surface is already difficult and the applied powder layer cannot be compacted by means of an axial pressure stamp movement.
  • a disadvantage of these known synchronizer rings is that the spot welding causes an uneven thermal load on the support ring with the risk of thermal stresses, that due to the spring action of the carrier plate between the welds, precise reworking of the friction lining is not possible and that in practice because of the given Support ring dimensions around the thickness of the carrier plate reduced thickness of the sintered material no tight manufacturing tolerances can be maintained.
  • the invention is based on the object of avoiding these deficiencies and to provide a manufacturing method for a synchronizer ring or a friction body of the type mentioned, with the help of which the support ring can be provided in a simple manner with a friction lining made of a sintered material without the sintered material apply a separate carrier and have to connect this carrier to the support ring.
  • This object is achieved according to the method initially mentioned at the outset by first forming a self-supporting, pressure-resistant shaped ring from a compacted sinter powder by presintering or setting by means of a binder, which is pressed into the support ring and then sintered to form the friction lining.
  • the object is achieved according to the invention in that the compact is produced as a shaped ring, and in that the shaped ring is sintered onto a cylindrical or conical surface of a support ring of a synchronizing ring.
  • a separate carrier plate can be omitted for the production of the friction lining and the molded ring prefabricated from the sintered material is pressed directly into the support ring and sintered with intimate connection with the support ring.
  • the prefabrication of a shaped ring also makes subsequent deformation of the friction lining to a greater extent unnecessary, so that neither in the friction lining itself nor in the connection of the friction lining with the support ring is an impairment of the load capacity due to such a deformation to be expected. Rather, a full-surface connection between the friction lining and the support ring is ensured, which not only does justice to all loads that occur, but also avoids a resilient support that otherwise arises between the connection points, which is directly reflected in an improved manufacturing tolerance when the friction surface is reworked .
  • the thickness of the carrier plate need not be taken into account when dimensioning the friction lining, so that the thickness of the shaped ring can be chosen to be correspondingly larger. This enables precise control of the density of the sintered material and, depending on it, its porosity. In addition, the incorporation of displacement grooves for a lubricant with a larger thickness of the friction lining is easier.
  • the sintered powder intended for the friction lining can be introduced into a corresponding mold and compressed.
  • Another possibility is to extrude the shaped ring To produce sinter powder.
  • the powder can be presintered after the compression molding in order to obtain a self-supporting body which has the compressive strength required for the further treatment.
  • a method is particularly suitable in which the sintered powder intended for the friction lining is pressed by extrusion to form a tube, from which the individual shaped rings are separated after presintering, because largely continuous production of the shaped rings is possible with such a manufacturing process .
  • a self-supporting molded ring is first produced from the sintered material, which has sufficient compressive strength for the pressing of this molded ring into a support ring.
  • the sintered powder mixture 1 provided for the friction lining is introduced into a mold 2 and pressed into a corresponding shaped body.
  • the required inherent strength is produced for the molded ring, which is pressed and sintered into the support ring after removal from the mold, resulting in an all-over, intimate connection between the molded ring forming the friction lining and the support ring.
  • the support ring is also made from a sintered material, the friction lining and the support ring can be sintered together.
  • Another possibility for producing self-supporting shaped rings is to compress the prepared sintered powder 1 in an extrusion press 3, which consists of an outer molded tube 4 and a mandrel 5 inserted into the molded tube 4 at a distance from one side.
  • an extrusion press 3 which consists of an outer molded tube 4 and a mandrel 5 inserted into the molded tube 4 at a distance from one side.
  • the sinter powder 1 is in the annular space between the molded tube 4 and the mandrel 5 are pressed, so that from the extruder 3 a tubular strand 6 emerges, from which the individual shaped rings 7 can be separated.
  • the required load capacity of the pipe string 6 can in turn be ensured by presintering the tubular sintered powder or by setting the pipe body by means of a binder admixed with the sintered powder.
  • the heat treatment for the pre-sintering of the tube 6 can be carried out while the tube strand is being conveyed through the shaped tube 4 of the extrusion press 3.
  • an optionally added binder can also set to a sufficient extent.
  • the cylindrical shaped rings can be subsequently expanded conically. If the shaped tube 4 and the mandrel 5 of the extrusion press 3 are flared in the outlet region of the tubular string 6, then it is also possible to produce conical rings directly by extrusion if the individual shaped rings immediately after the tubular string 6 exits the extruder 3 from the tubular string 6 be separated.
  • Fig. 3 shows a schematic cross section through part of a synchronizer ring, as it was produced by the inventive method.
  • the synchronizer ring 8 consists essentially of a support ring 9 made of metal or a sintered material.
  • the support ring 9 is provided with teeth on an outer circumferential surface, while an inner circumferential surface 11 represents a friction surface.
  • the friction surface 11 is preferably of a conical shape, but can also be of a cylindrical shape. It also goes without saying that the synchronizer ring 8 can also be provided on an inner circumferential surface with teeth and on an outer circumferential surface with a friction surface, or both an inner and an outer circumferential surface can each have axially spaced friction surfaces and Be provided teeth without going beyond the scope of the present invention.
  • the support ring 9 is provided with an annular friction body 12, which was produced according to one of the methods as was explained further above in relation to FIGS. 1 and 2.
  • the friction body 12 can be provided with recesses 13 on an inner circumferential surface and with further recesses 14 on an outer circumferential surface or a connecting surface 18 which fits into corresponding recesses in the support ring 9 in order to further increase the mechanical stability in a circumferential direction.
  • the depressions 13 can be used to hold lubricants.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Powder Metallurgy (AREA)
  • Braking Arrangements (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
EP88102404A 1987-02-21 1988-02-19 Procédé de fabrication d'un anneau de synchronisation Expired - Lifetime EP0280202B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102404T ATE88796T1 (de) 1987-02-21 1988-02-19 Verfahren zum herstellen eines synchronringes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3705660 1987-02-21
DE19873705660 DE3705660A1 (de) 1987-02-21 1987-02-21 Verfahren zum herstellen eines reibringes mit einer konischen oder zylindrischen reibflaeche

Publications (2)

Publication Number Publication Date
EP0280202A1 true EP0280202A1 (fr) 1988-08-31
EP0280202B1 EP0280202B1 (fr) 1993-04-28

Family

ID=6321525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102404A Expired - Lifetime EP0280202B1 (fr) 1987-02-21 1988-02-19 Procédé de fabrication d'un anneau de synchronisation

Country Status (8)

Country Link
US (1) US4940847A (fr)
EP (1) EP0280202B1 (fr)
JP (1) JPH0742487B2 (fr)
KR (1) KR950013936B1 (fr)
AT (1) ATE88796T1 (fr)
CA (1) CA1319252C (fr)
DE (2) DE3705660A1 (fr)
ES (1) ES2041710T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2724701A1 (fr) * 1994-09-21 1996-03-22 Miba Sintermetall Ag Procede pour assembler un dispositif de synchronisation destine a une boite de vitesses a engrenages
AT405494B (de) * 1996-02-14 1999-08-25 Miba Frictec Gmbh Verfahren zum herstellen einer ebenen reiblamelle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409098B (de) * 1989-03-30 2002-05-27 Miba Sintermetall Ag Verfahren zum herstellen eines reibringes für kupplungen oder bremsen mit einem gesinterten reibbelag
US5474635A (en) * 1994-03-07 1995-12-12 United Technologies Corporation Joining non-coplanar panels and structures of fiber reinforced composites
US5582281A (en) * 1994-07-19 1996-12-10 Chuetsu Metal Works Co., Ltd. Method of connecting a sliding member to a synchronizer ring
US5714179A (en) * 1995-10-30 1998-02-03 The Boeing Company Rigid tooling with compliant forming surface for forming parts from composite materials
JPH09202905A (ja) 1996-01-24 1997-08-05 Dainatsukusu:Kk 焼結によるシンクロナイザーリングの製造方法
DE102019004324A1 (de) * 2019-06-18 2020-12-24 Diehl Metall Stiftung & Co. Kg Verfahren zur Ermittlung der Festigkeit einer Klebstoffverbindung zwischen einem Synchronring und einem Reibbelag

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306401A (en) * 1965-04-21 1967-02-28 Lambert & Brake Corp Beryllium containing friction element
US3370947A (en) * 1964-02-03 1968-02-27 Talmage Charles Robert Method of securing a sintered metal brake track in a brake drum shell by expanding a green compact during sintering
DE3637386C1 (de) * 1986-11-03 1987-09-24 Neuenstein Zahnradwerk Verfahren und Vorrichtung zum Herstellen von Synchronisierungskoerpern in Stufengetrieben von Kraftfahrzeugen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA742954A (en) * 1966-09-20 General Motors Corporation Friction facing and method of making same
US2784112A (en) * 1952-05-17 1957-03-05 Carborundum Co Method of making silicon carbidebonded refractory bodies and coated metal articles
GB761417A (en) * 1953-09-23 1956-11-14 Hermann Joseph Franssen Method of producing plated objects
US3137602A (en) * 1959-08-21 1964-06-16 Continental Can Co Ceramic honeycomb
US3034860A (en) * 1960-04-04 1962-05-15 Stauffer Chemical Co Production of polymeric phosphorus pentoxide
US3239323A (en) * 1961-06-28 1966-03-08 Gen Electric Method for sealing ceramics
DE1900459A1 (de) * 1969-01-07 1970-09-17 Berges Beral Bremsbelag Kg Reibbelag fuer Bremsen,Kupplungen und aehnliche Einrichtungen
DE3417813C1 (de) * 1984-05-14 1985-06-05 Sinterstahl GmbH, 8958 Füssen Verwendung von Streusinter-Reibbelaegen in Reibkupplungen oder -bremsen
EP0267561A1 (fr) * 1986-11-14 1988-05-18 ZWN ZAHNRADWERK NEUENSTEIN GMBH & CO. Procédé de fabrication de corps de synchronisation pour transmissions de véhicule

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370947A (en) * 1964-02-03 1968-02-27 Talmage Charles Robert Method of securing a sintered metal brake track in a brake drum shell by expanding a green compact during sintering
US3306401A (en) * 1965-04-21 1967-02-28 Lambert & Brake Corp Beryllium containing friction element
DE3637386C1 (de) * 1986-11-03 1987-09-24 Neuenstein Zahnradwerk Verfahren und Vorrichtung zum Herstellen von Synchronisierungskoerpern in Stufengetrieben von Kraftfahrzeugen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2724701A1 (fr) * 1994-09-21 1996-03-22 Miba Sintermetall Ag Procede pour assembler un dispositif de synchronisation destine a une boite de vitesses a engrenages
AT405494B (de) * 1996-02-14 1999-08-25 Miba Frictec Gmbh Verfahren zum herstellen einer ebenen reiblamelle
US6105234A (en) * 1996-02-14 2000-08-22 Miba Frictec Gmbh Method of producing a flat friction disk

Also Published As

Publication number Publication date
CA1319252C (fr) 1993-06-22
EP0280202B1 (fr) 1993-04-28
DE3705660C2 (fr) 1990-11-29
KR880010265A (ko) 1988-10-07
ES2041710T3 (es) 1993-12-01
JPS63223105A (ja) 1988-09-16
US4940847A (en) 1990-07-10
JPH0742487B2 (ja) 1995-05-10
ATE88796T1 (de) 1993-05-15
DE3880529D1 (de) 1993-06-03
DE3705660A1 (de) 1988-09-08
KR950013936B1 (ko) 1995-11-18

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